V
* Hub van Doorne, (1900-1979), Netherlands, continuously variable transmission
* Louis R. Vitullo, (1924?-2006), United States — developed the first sexual assault evidence kit
* Alessandro Volta, (1745-1827), Italy — battery
* Faust Vrancic, (1551-1617), Croatia — parachute
W
* Barnes Wallis, (1887-1979), England — bouncing bomb
* Robert Watson-Watt, (1892-1973), Scotland — microwave radar
* James Watt, (1736-1819), Scotland — improved Steam engine
* Jonas Wenström, (1855-1893), Sweden — three-phase electrical system
* George Westinghouse, (1846-1914), USA — Air brake
* Charles Wheatstone, (1802-1875), England — concertina, stereoscope, microphone, Playfair cipher
* Eli Whitney, (1765-1825), USA — the cotton gin
* Frank Whittle, (1907-1996), England — co-inventor of the jet engine
* Otto Wichterle, (1913-1989), Czechoslovakia — invented modern contact lenses
* Paul Winchell, (1922-2005), USA — the artificial heart
* Edmund Wingate, (c.1593-1656), England — straight slide rule
* A. Baldwin Wood, (1879-1956), USA — high volume pump
* Granville Woods, (1856-1910), USA — the Synchronous Multiplex Railway Telegraph
* The Wright brothers, Orville Wright, (1871-1948) and Wilbur Wright, (1867-1912), USA — powered airplane
* Bruce Wydner, (1935-), USA — inventor of Cost-Effective Machine Translation
* Arthur Wynne, (1862-1945), England — creator of crossword puzzle
* Thomas Wedgwood, (1771-1805), England — first (not permanent) photograph
Y
* Hidetsugu Yagi, (1886-1976), Japan — Yagi antenna
* Yi Xing, (683-727), China, invented the first hydraulic-powered armillary sphere that used the escapement mechanism
* Arthur M. Young, (1905-1995), USA — the Bell Helicopter
Z
* Zhang Heng, (78-139), China, invented the first hydraulic-powered armillary sphere